Работает функционал переключения валют, остались правки по ui

lib/base/base_state.dart

@@ -41,7 +41,6 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
         }
       });
     }
-
     return getMainWidget();
   }
 

lib/base/settings_base_state.dart

@@ -5,9 +5,15 @@ import 'package:flutter/material.dart';
 
 abstract class SettingsBaseState<T extends StatefulWidget> extends BaseState<T> {
 
+  int selectedItem;
+
   @override
   Widget getScreenContent() {
 
+    print('getScreenContent: $selectedItem');
+    getSelectedValue();
+
+
     List<Widget> widgets = new List();
 
     for (String option in getOptions()) {
@@ -19,6 +25,10 @@ abstract class SettingsBaseState<T extends StatefulWidget> extends BaseState<T>
 
   List<String> getOptions();
 
+  void saveOption();
+
+  void getSelectedValue();
+
   @override
   List<Widget> getMenuButtons() {
     return null;
@@ -27,16 +37,21 @@ abstract class SettingsBaseState<T extends StatefulWidget> extends BaseState<T>
   Widget getItem(String option) {
     return new Container(
         height: 56.0,
-        child: (new FlatButton(onPressed: null,
+        child: (new FlatButton(onPressed: () {
+          saveOption();
+          setState(() {
+            selectedItem = getOptions().indexOf(option);
+          });
+        },
             child: new Row(children: <Widget>[
               new Expanded(child: new Text(option)),
-              getCheckMark()]))));
+              getCheckMark(getOptions().indexOf(option))]))));
   }
 
-  Widget getCheckMark() {
-    return new Image.asset(check_png,
+  Widget getCheckMark(int index) {
+    return index == selectedItem ? new Image.asset(check_png,
         width: 28.0,
-        height: 28.0);
+        height: 28.0) : new Image.asset(check_png, color: new Color(0xffffff));
   }
 
   @override

lib/db.dart

@@ -114,9 +114,15 @@ class SqliteHelper {
     return locale;
   }
 
-  Future<String> getCurrency() async {
+  Future<int> getCurrency() async {
     Map settings = await selectAll(tableSettings);
-    String currency = settings != null ? settings[columnCurrency] : null;
+    int currency = settings != null ? settings[columnCurrency] : null;
+    print('currency: {$currency}');
+    return currency;
+  }
+
+  Future<int> saveCurrency(int currency) async {
+    db.update(tableSettings, {columnCurrency: currency});
     print('currency: {$currency}');
     return currency;
   }

lib/screens/currencies.dart

@@ -1,8 +1,7 @@
 import 'package:checker/base/settings_base_state.dart';
 import 'package:flutter/material.dart';
-import 'package:checker/consts.dart';
 import 'package:checker/strings.dart';
-import 'package:checker/base/base_state.dart';
+import 'package:checker/common.dart';
 
 class CurrenciesScreen extends StatefulWidget {
   @override State createState() => new _CurrenciesState();
@@ -10,6 +9,8 @@ class CurrenciesScreen extends StatefulWidget {
 
 class _CurrenciesState extends SettingsBaseState<CurrenciesScreen> {
 
+  List<int> currencies = const [643, 840, 980];
+
   @override
   List<String> getOptions() {
 
@@ -20,8 +21,22 @@ class _CurrenciesState extends SettingsBaseState<CurrenciesScreen> {
     return [ruble, dollar, hryvna];
   }
 
+  @override
+  void getSelectedValue() {
+    helper.getCurrency().then((currency) {
+      setState(() {
+        selectedItem = currencies.indexOf(currency);
+      });
+    });
+  }
+
   @override
   String getTitle() {
     return StringsLocalization.settings();
   }
+
+  @override
+  saveOption() async {
+    await helper.saveCurrency(currencies[selectedItem]);
+  }
 }

lib/screens/languages.dart

@@ -2,6 +2,7 @@ import 'package:checker/base/settings_base_state.dart';
 import 'package:flutter/material.dart';
 import 'package:checker/consts.dart';
 import 'package:checker/strings.dart';
+import 'package:checker/common.dart';
 
 class LanguagesScreen extends StatefulWidget {
   @override State createState() => new _LanguagesState();
@@ -18,4 +19,19 @@ class _LanguagesState extends SettingsBaseState<LanguagesScreen> {
   String getTitle() {
     return StringsLocalization.locale();
   }
+
+  @override
+  void saveOption() {
+//    helper.sa(languages[selectedItem]);
+  }
+
+  @override
+  void getSelectedValue() {
+    helper.getLocale().then((locale) {
+      setState(() {
+        print(selectedItem);
+        selectedItem = getOptions().indexOf(getLocaleTitle(locale));
+      });
+    });
+  }
 }

lib/screens/purchase.dart

@@ -203,9 +203,10 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
           String url = user['purchases_url'];
 
+          helper.getCurrency().then((currency) {
             var body = {
               'doc_id': result,
-            'curr_iso_code': '643',
+              'curr_iso_code': currency.toString(),
               'commit': 'true',
               'sum_total': sumTotal
             };
@@ -228,6 +229,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
               print(error.toString());
             });
           });
+        });
       }
     }
   }